421444 has 6 divisors (see below), whose sum is σ = 737534. Its totient is φ = 210720.

The previous prime is 421433. The next prime is 421453. The reversal of 421444 is 444124.

421444 is an esthetic number in base 4, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in only one way, i.e., 407044 + 14400 = 638^2 + 120^2 .

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52677 + ... + 52684.

2⁴²¹⁴⁴⁴ is an apocalyptic number.

It is an amenable number.

421444 is a deficient number, since it is larger than the sum of its proper divisors (316090).

421444 is a wasteful number, since it uses less digits than its factorization.

421444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105365 (or 105363 counting only the distinct ones).

The product of its digits is 512, while the sum is 19.

The square root of 421444 is about 649.1871841002. The cubic root of 421444 is about 74.9744505566.

Adding to 421444 its reverse (444124), we get a palindrome (865568).

The spelling of 421444 in words is "four hundred twenty-one thousand, four hundred forty-four", and thus it is an iban number.